The sporophytes of Sphagnum flavicomans are uncommon. It is associated with S. cuspidatum, S. papillosum, S. rubellum, S. pulchrum, and S. torreyanum. This species is the ecological replacement for S. fuscum in much of the Atlantic coastal plain; compared to that species, S. flavicomans is substantially more robust and has a larger stem leaf with a more pointed apex. See also discussion under 83. S. subfulvum.